Mitsubishi ML520G71...Red Holy Grail or Flashlight Fail ??

[andyf97]

Are you just putting only the lens in front of the diode and getting the effect or do you have anything else ?

I have tried multiple Lens but all in the same retainer that came from Dave way back for the 445's. Is it just to small of an entrance on the retainer?

The best result was using the optima lens that is commonly used for the red 660's.

Picture of the retainer.

Attachment 28518Attachment 28519

[andyf97]

John,

Just to recap, a few weeks ago when I started to test this diode, I rejected the usual 445nm,HLXXX, 660nm etc.. Lenses because I didnt get anywhere with them, I cannot remember if I had such bug "Wings" anytime but often you do with laser diodes to a point but these are usually so fine to be almost invisible.

So if you are using a usual lens like O-like, for 445 or anything else similar, you wont get very good results on a G71 diode no matter how many prisms or cylindrical lenses you try. It takes a totally different lens to even start trying to get the beam good.

Andy

[polishedball]

Thanks I thought somewhere in here it was reported that the 4mm FL's from here worked http://optima-prec.com/molded.htm

Will look forward to you Lens info. Also to answer you question that is using a drlava cylindrical lens set, but it is the same issue with or without them.

John

John,

Just to recap, a few weeks ago when I started to test this diode, I rejected the usual 445nm,HLXXX, 660nm etc.. Lenses because I didnt get anywhere with them, I cannot remember if I had such bug "Wings" anytime but often you do with laser diodes to a point but these are usually so fine to be almost invisible.

So if you are using a usual lens like O-like, for 445 or anything else similar, you wont get very good results on a G71 diode no matter how many prisms or cylindrical lenses you try. It takes a totally different lens to even start trying to get the beam good.

Andy

[andyf97]

I didnt see any posts with the optima was good for the G71, it did get a bit confusing around a week ago with different lens ideas running around.

Thanks I thought somewhere in here it was reported that the 4mm FL's from here worked http://optima-prec.com/molded.htm

Will look forward to you Lens info. Also to answer you question that is using a drlava cylindrical lens set, but it is the same issue with or without them.

John

[CDBEAM]

I tried to take a beam shot....beam target is about 4M from the LD. Wings can be seen...above and below the main dot...about 100mm in either direction...very faint tho. Other pic is of a pinhole mask I attached to the C-Lens mount front....with an aperature dia. at 4.5mm. This does eliminate some trash...not all...but does knock of 30 mW of output.

Drlava !!! How many does it take to get a GB.... ??? Dave...Simon....any interest to doa GB for C-Lenses ??????????????????

BEAM

[polishedball]

EDIT : found it ~ Guessing you mentioned it somewhere else in the 16 pages, but what lens are you using?

I tried to take a beam shot....beam target is about 4M from the LD. Wings can be seen...above and below the main dot...about 100mm in either direction...very faint tho. Other pic is of a pinhole mask I attached to the C-Lens mount front....with an aperature dia. at 4.5mm. This does eliminate some trash...not all...but does knock of 30 mW of output.

Drlava !!! How many does it take to get a GB.... ??? Dave...Simon....any interest to doa GB for C-Lenses ??????????????????

BEAM

[CDBEAM]

For now....405 G 2 for collimation and original GB DRlava Cylinderical....In the future....LSP 3mmFL in adjustable LD mount...and likely a 6 to 8 magnification set of Cylinderical lenses....and...and....hopefully....I will be taking the ML501P73 for a spin around the block !!!. Sometimes technology moves very fast....Yikes.....Beam

[andyf97]

For now....405 G 2 for collimation and original GB DRlava Cylinderical....In the future....LSP 3mmFL in adjustable LD mount...and likely a 6 to 8 magnification set of Cylinderical lenses....and...and....hopefully....I will be taking the ML501P73 for a spin around the block !!!. Sometimes technology moves very fast....Yikes.....Beam

Re:ML501P73
I have been trying to find a pair for ages to buy and test, seams they are quite hard to find, even tried directly but 12weeks was the soonest possible. If you find a source let me know we can then order a few more to drop the price.

[CDBEAM]

Andy...I think DTR has some coming....but it seems as though the shippment has been delayed. I am not sure where or IF he is getting some !!! DTR ??? BEAM

[polishedball]

So what Kind of power are you seeing out of this diode? I only fired up one of mine, but it was holding at 730mw at under a amp of current. This was metered close as I was loosing alot to the wing issue I have, but reading there can be a big difference? some people peak at 500mw?